A Starfleet task force at Deep Space 9 (2372)
A task force was a grouping of personal or starships that were brought together to undertake a specific mission.
Soldiers from a Xindi-Reptilian task force boarded the Enterprise in 2153 to retrieve their operative, Rajiin. (ENT: "Rajiin")
In 2273, a Klingon task force, led by the IKS Amar, was sent to investigate V'Ger. All of the ships involved were eliminated. (Star Trek: The Motion Picture)
In 2366, a Starfleet task force was assembled at Wolf 359 to stand against an advancing Borg cube. (TNG: "The Best of Both Worlds"; DS9: "Emissary")
In 2367, Commander Shelby was to head up the task force that would "have the fleet back up in less than a year" after the losses at the Battle of Wolf 359. (TNG: "The Best of Both Worlds, Part II")
In 2369, Vice Admiral Nechayev assembled a 15 ship fleet consisting of five task forces with the stated aim of defending Federation colonies from an anticipated second Borg invasion. Admiral Nechayev would command the fleet from the flagship USS Gorkon. One of these task forces, designated task force three, was commanded by Captain Jean-Luc Picard and consisted of the USS Agamemnon, the USS Crazy Horse, and the USS Enterprise-D. (TNG: "Descent")
In 2371, a Starfleet task force, consisting of nine starships, was sent to protect Bajor from a possible Jem'Hadar attack. (DS9: "The Die is Cast")
In 2372, a Klingon task force, led by the new flagship Negh'Var, arrived at Deep Space 9. The task force was supposedly there to assist the Federation in defense of the Alpha and Beta Quadrants, but in reality the station was being used as a staging post for an invasion of the Cardassian Union. (DS9: "The Way of the Warrior")
Several days later, Admiral Hastur led a task force of six ships to Deep Space 9 after it was attacked by the Klingons. The USS Venture led the force. Other starships in the task force included two Template:ShipClass ships and a Template:ShipClass starship. (DS9: "The Way of the Warrior")
Later in 2372, a Klingon task force took the Archanis sector. (DS9: "Apocalypse Rising")
Admiral Gilhouly led another task force to Deep Space 9 in 2373, to help the station fight against a possible Dominion attack. The task force was later bolstered with the addition of Klingon and Romulan starships. The task force was almost destroyed after a Founder attempted to detonate a bomb in the Bajoran sun using the USS Yukon . Fortunately, he was stopped by the USS Defiant. (DS9: "By Inferno's Light")
Later that year, a combined Starfleet and Klingon task force attacked the Dominion shipyards near Torros III. (DS9: "Call to Arms")
Early in the Dominion War, elements of the Second and Fifth Fleets were merged into a task force, commanded by Benjamin Sisko, to retake Deep Space 9. (DS9: "Favor the Bold", "Sacrifice of Angels")
In 2379, a Starfleet task force, Star Fleet Battle Group Omega, was deployed in Sector 1045 to counter an impending Reman incursion. Several weeks later, Captain William T. Riker of the USS Titan led a task force to the Romulan Neutral Zone to engage in direct talks for a final peace between the two sides. (Star Trek Nemesis)